You sure must have uploaded a lot of files and images because WordPress.com blogs come with 3000 megabytes (~3 GBs) of space for storing uploaded files and images. Our posts and pages are included in that at all ie. there is no space limitation on them. I've been here over 6 years and I am currently using only 76.9 MB out of 3.0 GB upload limit - only 3%. If you need more space you can purchase a Space Upgrade but I suspect you may just be confused. http://en.support.wordpress.com/space-upgrade/

I'd like to have previous posts somewhere where people can see them, including photos.